The family of the woman convicted of murdering physicist Bob Chappell on Australia Day four years ago is pushing for an inquest into his death.

Susan Neill-Fraser was convicted of her partner's murder in 2010 and is serving a 23-year prison sentence.

In September, she lost an appeal to the High Court.

Neill-Fraser's daughter Sarah Bowles said new evidence had come to light that warranted reopening the investigation.

"For me this is not only about justice for mum, it's also about finding out what happened to Bob," Ms Bowles said.

"You know we have no closure. We don't know where his body is or how he died, when he died, where he's been laid to rest. We have a conviction, we still don't have answers."

Ms Bowles said her mother's situation echoed that of Lindy Chamberlain who was wrongly convicted of killing her baby daughter Azaria in 1980.

"Lindy Chamberlain was demonised quite a lot through media and also through the court processes she went through and we know that she had to go through lot of hurdles to finally have justice," Ms Bowles said.

"There are many similarities and parallels between what she went through and what mum is going through as well."